Storms bring downpours, flooding to the Philadelphia region | More storm chances, fog in the Phil…

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Storms bring downpours, flooding to the Philadelphia region

Severe storms brought downpours and localized flooding to the Philadelphia region on Wednesday, Aug. 13, 2025. The updates below.

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More storm chances, fog in the Philadelphia weather forecast for Thursday

Weather in the Philadelphia area is once again foggy on Thursday before more storms arrive in the afternoon hours.

The morning fog will likely become more widespread around daybreak, but we're already seeing low visibility around the Brandywine Valley in Pennsylvania and Delaware.

As far as the storms, these will likely blossom by midday along the I-95 corridor before moving east. We are under a low, Level 1 risk of flooding today, as these storms could be slow-moving and produce flooding downpours.

Expect storms to move out by 8 p.m. before we dry out for Friday.

Otherwise, expect high temperatures in the 80s across the region, a little cooler at the Shore. Up in the Lehigh Valley, which got more of the brunt of the storms on Wednesday. Storms should be more isolated on Thursday. 

Flood warnings were issued for Philly and parts of the region, and a flood watch remained in effect until 1 a.m. Thursday

The rains come after what has been an impressive dry spell.

Downpours on Wednesday that interrupted what had been an impressive region-wide dry spell set off flood warnings for Philly and portions of the neighboring counties during the night.

In addition to the warnings, a flood watch for the entire region remained in effect until 1 a.m. Thursday.

Thunderstorms began rumbling into the region after 5 p.m., generating targeted downpours.

The National Weather Service reported that up to 3.5 inches had fallen in portions of the warned area, which included parts of the city and Bucks, Chester, Delaware, Montgomery and Burlington Counties. The warnings were in effect until 11 p.m.

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